@SonicComix1: Yeah, that's editing. You haven't seen the customs I've done for Sans. But I'm guessing that if they're not customs, or that the character looks TOTALLY unoriginal, then the author behind the avatar must SUCK, huh? Is that what you're telling me?

Okay, the ring around his gloves. That's actually how I wanted it to be designed. Glad to know you think the gloves must match the band.

Again, still working on the pants.

And just because they're so close of a color doesn't mean they should be the same color.

Boys, chill.
I'll give my own criticisms, since i'm obviously a veteran on this site;

Quills do need work. Either part them a bit more or lower a quill's tip.
Bangs also need a bit of work. It looks copy-paste and sticks out like a sore thumb. You can either recolor it a different color or add a marking to separate it from the main body, or possibly color it the same color as the main body. Could be possible to change the bang design as well.

Pants need a bit of work as well. Needs more shade and less contrast.

Shoes are dull- Sonic shoes recolor is obviously used a bit much. Maybe add something to call the design your own, like steel toes or a small emblem, something to make it unique for the character.

Sleeves look a bit better. The problem is that on the big sprite, it sticks out like a sore thumb. This time, add more contrast.

Everything else is fine, but all the things I mentioned hurt. And yes, as SonicComix says, the character doesn't look original and the shading is off. I had the same problem when I started spriting, but I hope this crit helps.